Wheelchair suspension



FIG. 1 is a left side elevational view of a wheelchair suspension showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a right side elevational view thereof.

The broken line in FIG. 1 showing the portions of the frame, the swing-arm, the drive motor, and the drive wheel is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a wheelchair suspension, as shown and described. 